Drought Information Statement
Issued by NWS Riverton, WY

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AXUS75 KRIW 151045
DGTRIW
WYC003-013-017-019-023-025-029-035-037-039-043-171045-

DROUGHT INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
445 AM MDT FRI APR 15 2016

...WET MARCH SHRINKS DROUGHT AREAS ACROSS NORTHERN AND CENTRAL
WYOMING..

SYNOPSIS...

WYOMING HAD ITS 13TH WETTEST MARCH IN THE LAST 122 YEARS WITH A
STATEWIDE AVERAGE OF 1.91 INCHES OF PRECIPITATION. THIS WAS 153
PERCENT OF THE 20TH CENTURY AVERAGE. MOST OF THIS PRECIPITATION
FELL ACROSS THE LOWER NORTH PLATTE...WIND RIVER...SWEETWATER AND
LOWER GREEN RIVER BASIN...ELIMINATING MOST OF THE ABNORMALLY DRY
/D0/ AND MODERATE /D1/ CONDITIONS THAT DEVELOPED THROUGH THE FIRST
PART OF 2016. SEVERE /D2/ DROUGHT REMAIN OVER THE BIGHORN RANGE
WITH MODERATE /D1/ DROUGHT ACROSS THE FAR NORTH AND EASTERN
BIGHORN BASIN...AND ACROSS THE WESTERN WIND RIVER RANGE ON THE
APRIL 12TH RELEASE OF THE DROUGHT MONITOR.

SUMMARY OF IMPACTS...

RIVER AND STREAMFLOW CONDITIONS.

SLIGHTLY BELOW NORMAL SNOWMELT STREAMFLOW VOLUMES (90 TO 95
PERCENT) ARE EXPECTED ACROSS ALMOST ALL MAJOR BASINS ACROSS
WYOMING. SLIGHTLY ABOVE NORMAL STREAMFLOW VOLUMES ARE EXPECTED
ACROSS A MAJORITY OF THE WIND RIVER BASIN AND PORTIONS OF THE
SHOSHONE AND UPPER NORTH PLATTE WATERSHEDS. THE SWEETWATER...POWDER
AND TONGUE RIVER BASINS ARE FORECASTED TO HAVE BELOW TO MUCH
BELOW NORMAL STREAMFLOW VOLUMES DURING THIS UPCOMING SNOWMELT
SEASON. RESERVOIR STORAGES ACROSS WYOMING INCREASED TO 115 TO 125
PERCENT ABOVE AVERAGE FOR APRIL.

FIRE WEATHER IMPACTS...

THOUGH GRASSES WERE STARTING TO GREENUP IN THE LOWER CENTRAL
BASINS...SEVERAL AGRICULTURAL BURNS HAVE GOTTEN OUT OF CONTROL
IN EARLY APRIL WHERE VEGETATION REMAINS DRY.

THE SIGNIFICANT WILDLAND FIRE POTENTIAL OUTLOOK THROUGH JULY 2016
SHOWS A NORMAL LIKELIHOOD THAT SIGNIFICANT WILDLAND FIRES WILL
OCCUR. SIGNIFICANT WILDLAND FIRES SHOULD BE EXPECTED AT TYPICAL
TIMES AND INTERVALS DURING NORMAL SIGNIFICANT WILDLAND FIRE
POTENTIAL CONDITIONS.

CLIMATE SUMMARY...

BELOW ARE THE CUMULATIVE PRECIPITATION AMOUNTS FROM
SELECTED LOCATIONS ACROSS WEST AND CENTRAL WYOMING FOR THE
CURRENT WATER YEAR.

NOTE: BASIN-WIDE PERCENT OF AVERAGES ARE BASED ON 20TH CENTURY
(1901-2000) AVERAGES. SPECIFIC LOCATIONS PERCENT OF AVERAGES ARE
BASED ON 1981-2010 NORMALS.

LOCATION               PRECIPITATION       % AVERAGE
AND DROUGHT            (INCHES)
CONDITION              OCT 2015-MAR 2016
--------               -----------------   ---------

YELLOWSTONE BASIN AVG.    14.50               119
  OLD FAITHFUL            11.02                82

SNAKE BASIN AVG.          20.04                98
  AFTON                    7.49                91
  MOOSE                   14.11               110

GREEN AND BEAR BASIN AVG.  6.52                99
0 BIG PINEY AIRPORT        2.23               104
0 EVANSTON AIRPORT         1.56                33
0 FOSSIL BUTTE N.M.        5.99               127
  GREEN RIVER              5.61               179
  ROCK SPRINGS AIRPORT     1.14                33
  ROCK SPRINGS             4.28               116

BIGHORN BASIN AVG.         5.76               100
0 CODY                     3.76               129
0 GREYBULL AIRPORT         0.97                49
0 POWELL FIELD STATION     1.43                95
  THERMOPOLIS              5.49               131
0 WORLAND AIRPORT          2.29               107

POWDER/TONGUE BASIN AVG.   4.25                87
0 BUFFALO AIRPORT          2.49                70
  KAYCEE                   2.28                69
0 SHERIDAN AIRPORT         5.19               109

LOWER PLATTE BASIN AVG     6.75               152
  CASPER AIRPORT           5.52               130
  CHEYENNE AIRPORT         7.32               190

WIND RIVER BASIN AVG.      6.44               107
0 DUBOIS                   3.43               128
  LANDER AIRPORT           8.07               165
  RIVERTON AIRPORT         4.22               152
  RIVERTON (DOWNTOWN)      4.84               183

UPPER PLATTE BASIN AVG.    6.22               115
  JEFFREY CITY             3.51               100

--------------------------------------------
| STATION`S DROUGHT INTENSITY (LEFT COLUMN):|
| 3 - LOCATION IN EXTREME DROUGHT/D3/       |
| 2 - LOCATION IN SEVERE DROUGHT /D2/       |
| 1 - LOCATION IN MODERATE DROUGHT /D1/     |
| 0 - LOCATION ABNORMALLY DRY /D0/          |
|   - NONE                                  |
|                                           |
| (M) MISSING PRECIPITATION DATA IN RECORD  |
--------------------------------------------

PRECIPITATION/TEMPERATURE OUTLOOKS...

BOTH THE 30 DAY (APRIL) AND 90 DAY (APRIL-JUNE) OUTLOOKS SHOWED AN ELEVATED
CHANCE OF ABOVE NORMAL TEMPERATURES ACROSS WYOMING...WITH THE
GREATEST CHANCE ACROSS WESTERN WYOMING. THE 90 DAY PRECIPITATION
OUTLOOKS SHOWED AN ELEVATED CHANCE OF ABOVE NORMAL PRECIPITATION
ACROSS MOST OF WYOMING...EXCEPT THE NORTHEAST CORNER WHERE THERE
WAS NO CLEAR CLIMATE SIGNAL.

THE SEASONAL DROUGHT OUTLOOK SHOWED EITHER IMPROVEMENT OR REMOVAL
OF DROUGHT CONDITIONS BY THE END OF JUNE ACROSS NORTH CENTRAL
WYOMING AND THE WESTERN WIND RIVER RANGE. THERE WERE NO AREAS OF
NEW DROUGHT DEVELOPMENT FORECAST IN WYOMING THROUGH THE END OF
JUNE.

HYDROLOGIC SUMMARY AND OUTLOOK...

SNOWPACK DATA

DRAINAGE BASIN     SNOW WATER EQUIVALENT (SWE)      PERCENT CHANGE
                   PERCENT OF MEDIAN ON APRIL 14TH  SINCE MARCH 19TH
--------------     ---------------------------      ----------------
SNAKE RIVER                   89                        - 9
MADISON                       81                        -10
YELLOWSTONE                   83                        - 5
WIND RIVER                    90                        +10
BIGHORN BASIN                 73                          0
SHOSHONE RIVER                79                        -12
POWDER                        73                        + 5
TONGUE                        60                        + 6
UPPER PLATTE                  94                        - 3
SWEETWATER                    83                        +11
LOWER NORTH PLATTE           101                        +17
LARAMIE                      106                        - 6
SOUTH PLATTE                 125                        +10
LITTLE SNAKE RIVER            87                        -12
UPPER GREEN                   90                        -10
LOWER GREEN                   92                        - 9
UPPER BEAR                    79                        -18
----------------------       ----                       ---


RESERVOIR DATA FOR APRIL 14TH -
RESERVOIR                 PERCENT FULL

CENTRAL WYOMING
BOYSEN                      79.7
BUFFALO BILL                68.9
BULL LAKE                   47.4
PATHFINDER                  81.1

UPPER GREEN RIVER BASIN
BIG SANDY                   60.0
FONTENELLE                  43.0
FLAMING GORGE               85.0

UPPER SNAKE RIVER BASIN
GRASSY LAKE                 90.0
JACKSON LAKE                69.0

NEXT ISSUANCE DATE...

THIS PRODUCT WILL BE UPDATED ON MAY 15 2016 OR SOONER IF
NECESSARY IN RESPONSE TO SIGNIFICANT CHANGES IN CONDITIONS.

&&

RELATED WEB SITES...

ADDITIONAL INFORMATION ON CURRENT DROUGHT CONDITIONS MAY BE FOUND AT
THE FOLLOWING WEB ADDRESSES /USE LOWER CASE LETTERS/...

TO REPORT EFFECTS OF THE DROUGHT IN YOUR AREA...PLEASE GO TO THE
DROUGHT IMPACT REPORTER AT...

HTTP://DROUGHTREPORTER.UNL.EDU/

...AND CLICK ON SUBMIT A REPORT.

INFORMATION FOR THE MEDIA MAY BE FOUND AT...

HTTP://DROUGHT.UNL.EDU/NEWSOUTREACH/INFORMATIONFORMEDIA.ASPX

NWS RIVERTON DROUGHT PAGE...
HTTP://WWW.WEATHER.GOV/RIW/DROUGHT

WIND RIVER INDIAN RESERVATION AND SURROUNDING AREA CLIMATE AND
DROUGHT SUMMARIES...

HTTP://REVAMPCLIMATE.COLOSTATE.EDU/REVAMP/PROJECT/WIND-RIVER-
DROUGHT-PREPAREDNESS

USGS WYOMING DROUGHT WATCH...
HTTP://WY.WATER.USGS.GOV/PROJECTS/DROUGHT/

U.S. DROUGHT MONITOR...HTTP://WWW.DROUGHT.GOV

NOAA DROUGHT PAGE...HTTP://WWW.DROUGHT.NOAA.GOV

CLIMATE PREDICTION CENTER /CPC/...HTTP://WWW.CPC.NCEP.NOAA.GOV

ADDITIONAL RIVER AND RESERVOIR INFORMATION...

NWS ADVANCED HYDROLOGIC PREDICTION SERVICE /AHPS/...
HTTP://WWW.WATER.GOV/AHPS2/INDEX.PHP?WFO=RIW

NRCS WYOMING...HTTP://WWW.WY.NRCS.USDA.GOV

USGS...HTTP://WATER.USGS.GOV/

USBR...HTTP://WWW.USBR.GOV/

WATER RESOURCE DATA SYSTEM (WRDS)...HTTP://WWW.WRDS.UWYO.EDU

ACKNOWLEDGMENTS...

THE DROUGHT MONITOR IS A MULTI-AGENCY EFFORT INVOLVING NOAA/S
NATIONAL WEATHER SERVICE AND NATIONAL CLIMATIC DATA CENTER...THE
USDA...STATE AND REGIONAL CENTER CLIMATOLOGISTS AND THE NATIONAL
DROUGHT MITIGATION CENTER. INFORMATION FOR THIS STATEMENT HAS BEEN
GATHERED FROM NWS AND FAA OBSERVATION SITES...STATE COOPERATIVE
EXTENSION SERVICES...THE USDA...USACE AND USGS.

QUESTIONS OR COMMENTS...

IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS DROUGHT INFORMATION
STATEMENT...PLEASE CONTACT...

ARTHUR MEUNIER
CLIMATE/DROUGHT FOCAL POINT
NATIONAL WEATHER SERVICE
12744 WEST US HIGHWAY 26
RIVERTON, WY  82501
TELEPHONE...307-857-3898
............800-211-1448
EMAIL...ARTHUR.MEUNIER@NOAA.GOV

$$



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